Local area network for vehicle

Details Local area network for vehicle Local area network for vehicle

1986-07-24

1988-04-19

Shoop, Jr., William M.

Electrical transmission or interconnection systems

Vehicle mounted systems

307 10R, 307 41, 340 52R, 340 52F, 34082506, B60Q 100

Patent

active

047391839

ABSTRACT:
Disclosed is a local area network for a vehicle which comprises a plurality of terminal stations each having an input/output port for various signals, a main-loop formed by series connection of the terminal stations and transmission lines, a sub-loop arranged in parallel to the main-loop and formed by series connection of the terminal stations and transmission lines, and controllers. One of the terminal stations receives a large amount of information such as an audio signal from an audio transmitter and one of the other terminal stations supplies a large amount of information such as an audio signal to an audio receiver. When the main-loop is in a normal operation state, the main-loop operates as a token-passing system and the sub-loop acts as a direct transmission route from one of the terminal stations to another terminal station, and when the main-loop is in an abnormal operation state, the main-loop is coupled with the sub-loop and the transmitting of information such as an audio signal is stopped, and simultaneously, the sub-loop is switched to the token-passing system. Thus, the double loops, i.e., the main-loop and the sub-loop, are effectively utilized. In addition, any decrease in the reliability of various signals transmission when a failure of the main-loop occurs, can be prevented.

REFERENCES:
patent: 3952286 (1976-04-01), Wakamatsu et al.
patent: 4156151 (1979-05-01), Borroni
patent: 4302841 (1981-11-01), McCulloch
patent: 4459591 (1984-07-01), Hauber et al.
patent: 4471356 (1984-09-01), Gidl
patent: 4516121 (1985-05-01), Moriyama et al.
patent: 4538262 (1985-08-01), Sinniger et al.
patent: 4554461 (1985-11-01), Oho et al.
patent: 4584487 (1986-04-01), Hesse et al.
patent: 4594571 (1986-06-01), Neuhaus et al.
patent: 4652853 (1987-03-01), Tagami et al.

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